Tuilinn is surprised that you did not know the full story of how a Man, even one as respected as Aragorn, was able to successfully court a high-born Elf-lady like Arwen.
'My name is Tuilinn. What are you called? ${PLAYER}? The name is familiar...are you a friend to Aragorn son of Arathorn? Ah yes, you helped reforge Narsil from its shards! It is a pleasure and an honour to make your acquaintance.
'I remember when all of us here at Cerin Amroth once greatly doubted his fitness to court our sweet Undómiel...but I am sure you know the tale of their romance. What? You do not? I suppose, with Elessar being as close as he is, it is not all that surprising. Nevertheless, if you are interested, you should certainly learn the tale, as it is sweet indeed.
'Oh, not from me. I have only pieces of it myself; I shall, however, send you to those from whom I learned the rest. Pennasseth, known as the Keeper of Stories, has befriended one of the visiting hobbits, along the path towards the city. Naeris, called the Guardian of Lore, can usually be found in a clearing east of here in Gelirdor, with his friend Sendiel. Meluibrennil, currently visiting the lovely garden of Santhirwen, south of here, helped care for Arwen Undómiel when she was young.'
Tuilinn has sent you to three Elves who each know an aspect of the tale of the romance of Elessar and Undómiel.
From Cerin Amroth, Pennasseth can be found to the south-west at Cerin Nauth. Naeris is in the Peaceful Glade, due east. Meluibrennil is in Bain Gwaloth a short ways to the south-east.
Tuilinn awaits you atop the flet at Cerin Amroth.
You should return to Tuilinn now that you have heard the tale of Elessar and Undómiel.